Shower device and fluid injection adapter

Abstract

The present invention provides a shower device that allows a liquid such as a moisturizing solution to be injected into the shower head. [Solution] The shower device comprises a shower head having a shower body and a watering nozzle, and a fluid injection adapter. The fluid injection adapter comprises a guide cylinder having a liquid inlet hole and a fluid injection hole, a switching shaft having a liquid inlet passage and a fluid injection passage and being movable relative to the guide cylinder and inserted into the guide cylinder, a liquid inlet cylinder having a liquid inlet hole communicating with the liquid inlet hole, and a liquid outlet cylinder having a liquid outlet passage communicating with the fluid injection hole. The switching shaft moves in the direction of the centerline of the guide cylinder between a first switching position in which the fluid injection passage communicates with the fluid inlet hole, and a second switching position in which the liquid inlet passage communicates with the liquid inlet hole and the fluid injection hole. The shower body is connected to the liquid outlet cylinder by connecting the liquid flow passage of the shower body to the liquid outlet hole.

Description

Technical Field

[0001] The present invention relates to a shower device and a fluid injection adapter.

Background Art

[0002] As a technology of a shower device, Patent Document 1 discloses a hand shower. The hand shower includes a shower head, a handle portion, an opening / closing valve body, and a pair of push buttons. The gripping portion is connected to the shower head and has a water passage inside. The opening / closing valve body is attached to the gripping portion and opens and closes the water passage. Each push button is attached to each end side of the opening / closing valve body. The hand shower adjusts the opening degree of the water outlet of the opening / closing valve body by rotating one of the push buttons.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Patent Document 1 cannot inject various functional liquids such as moisturizing liquid into the water passage of the gripping portion.

[0005] An object of the present invention is to provide a shower device and a fluid injection adapter that can inject various functional liquids such as moisturizing liquid into the shower body of the shower head.

Means for Solving the Problems

[0006] Claim 1 of the present invention comprises a fluid injection adapter, a shower head having a cylindrical shower body and a watering nozzle connected to one end face of the shower body, wherein the fluid injection adapter comprises an adapter body having a guide cylinder, a liquid inlet cylinder into which liquid flows, and a liquid outlet cylinder, and a switching shaft having a liquid inlet passage and a fluid injection passage, wherein the guide cylinder has shaft holes that penetrate the guide cylinder and open to each end face of the guide cylinder, and is arranged at intervals on one end face of the guide cylinder and penetrates the guide cylinder and opens to the outer circumferential surface of the guide cylinder and the shaft holes The liquid inlet cylinder has a liquid inlet hole, and a fluid injection hole that is positioned between the liquid inlet hole and the other end face of the guide cylinder at a distance from the liquid inlet hole in the direction of the centerline of the guide cylinder, and penetrates the guide cylinder and opens to the outer circumferential surface of the guide cylinder and the shaft hole, and the liquid inlet cylinder has a liquid inlet hole that penetrates the liquid inlet cylinder and opens to each end face of the liquid inlet cylinder into which liquid flows, and one end face of the liquid inlet cylinder abuts against the outer circumferential surface of the guide cylinder and is fixed to the guide cylinder, and the liquid inlet hole is in communication with the liquid inlet hole and is positioned on the guide cylinder, and the liquid outlet The cylindrical body penetrates the liquid discharge cylinder and has liquid discharge holes opening at each end face of the liquid discharge cylinder, one end face of the liquid discharge cylinder abuts against the outer circumferential surface of the guide cylinder and is fixed to the guide cylinder, the liquid discharge holes communicate with the fluid injection holes and are arranged in the guide cylinder, the liquid inflow passage is arranged at a distance from one end face of the switching shaft in the direction of the axis centerline of the switching shaft, penetrates the switching shaft and opens to the outer circumferential surface of the switching shaft, the fluid injection passage is arranged at a distance from the liquid inflow passage in the direction of the axis centerline of the switching shaft and the front Displaced between the other end faces of the switching shaft, passing through the switching shaft, and opening to the outer circumferential surface of the switching shaft and the other end face of the switching shaft, the switching shaft is inserted into the shaft hole with one end face of the switching shaft protruding from one end face of the guide cylinder and the other end face of the switching shaft protruding from the other end face of the guide cylinder, and is positioned in the shaft hole so as to be movable relative to the guide cylinder in the direction of the cylinder centerline of the guide cylinder, and moves between a first switching position and a second switching position in the direction of the cylinder centerline of the guide cylinder, and at the first switching position,The shower device is characterized in that the liquid inlet passage is blocked from the liquid inlet hole and the fluid injection hole, the fluid injection passage is connected to the fluid injection hole through an opening on the outer surface of the switching shaft, and in the second switching position, the fluid injection passage is blocked from the fluid injection hole, and the liquid inlet passage is connected to the liquid inlet hole and the fluid injection hole, the shower body has a liquid flow passage that penetrates the shower body and opens to each end face of the shower body, the other end face of the shower body is connected to the liquid outlet cylinder, and the liquid flow passage is connected to the liquid outlet hole and arranged on the adapter body, and the watering nozzle is connected to the liquid flow passage and has a watering nozzle hole for discharging liquid.

[0007] Claim 2 of the present invention relates to an adapter body having a guide cylinder, a liquid inlet cylinder into which liquid flows, and a liquid outlet cylinder, and a switching shaft having a liquid inlet passage and a fluid injection passage, wherein the guide cylinder has shaft holes that penetrate the guide cylinder and open to each end face of the guide cylinder, a liquid introduction hole that is spaced apart on one end face of the guide cylinder and penetrates the guide cylinder and opens to the outer circumferential surface of the guide cylinder and the shaft holes, and a shaft that is spaced apart from the liquid introduction hole and between the liquid introduction hole and the other end face of the guide cylinder in the direction of the centerline of the cylinder of the guide cylinder and penetrates the guide cylinder The liquid inlet cylinder has a fluid injection hole opening on the outer circumferential surface of the guide cylinder and the shaft hole, the liquid inlet cylinder has a liquid inlet hole that penetrates the liquid inlet cylinder and opens on each end face of the liquid inlet cylinder into which liquid flows, one end face of the liquid inlet cylinder abuts against the outer circumferential surface of the guide cylinder and is fixed to the guide cylinder, the liquid inlet hole is in communication with the liquid introduction hole and is arranged on the guide cylinder, the liquid outlet cylinder has a liquid outlet hole that penetrates the liquid outlet cylinder and opens on each end face of the liquid outlet cylinder, one end face of the liquid outlet cylinder abuts against the outer circumferential surface of the guide cylinder and the liquid outlet cylinder is fixed to the guide cylinder Fixed to the inner cylinder, the liquid outlet hole communicates with the fluid injection hole, and is arranged in the guide cylinder. The liquid inlet passage is positioned at a distance from one end face of the switching shaft in the direction of the axial centerline of the switching shaft, passes through the switching shaft, and opens to the outer circumferential surface of the switching shaft. The fluid injection passage is positioned at a distance from the liquid inlet passage in the direction of the axial centerline of the switching shaft, between the liquid inlet passage and the other end face of the switching shaft, passes through the switching shaft, and opens to the outer circumferential surface of the switching shaft and the other end face of the switching shaft. The switching shaft is the switching shaft One end face of the body protrudes from one end face of the guide cylinder, and the other end face of the switching shaft protrudes from the other end face of the guide cylinder, and is inserted into the shaft hole, and is positioned in the shaft hole so as to be movable relative to the guide cylinder in the direction of the cylinder centerline of the guide cylinder, and moves between a first switching position and a second switching position in the direction of the cylinder centerline of the guide cylinder, and at the first switching position, the liquid inflow passage is blocked from the liquid introduction hole and the fluid injection hole, and the fluid injection passage is connected to the fluid injection hole from an opening on the outer circumference of the switching shaft, and at the second switching position,This fluid injection adapter is characterized by separating the fluid injection passage from the fluid injection hole and connecting the liquid inlet passage to the liquid inlet hole and the fluid injection hole.

[0008] Claim 3 of the present invention relates to a fluid injection passage connected to a pressure vessel when the switching shaft is in the first switching position, wherein the pressure vessel comprises a container body for storing a liquid different from the liquid flowing into the liquid inlet hole and a propellant, a mount cap fixed to the container body and closing the opening of the container body, and a stem formed in an axial shape and having a liquid injection hole opening at one end of the shaft, wherein the stem is movably arranged with respect to the mount cap, with one end of the shaft protruding from the mount cap and the other end of the shaft inserted into the container body, and one end of the shaft protruding from the mount cap The shower device according to claim 1 is characterized in that the other end face of the switching shaft is inserted into the fluid injection passage, one end face of the switching shaft is brought into contact with the stepped portion of the fluid injection passage, the liquid injection hole is connected to the fluid injection passage, the container body is moved toward the other end face of the switching shaft with one end face of the stem in contact with the stepped portion, the stem is pushed into the container body, the liquid stored in the container body flows into the liquid injection hole due to the pressure of the propellant, and the liquid injection hole injects the liquid flowed in from the container body into the fluid injection passage.

[0009] Claim 4 of the present invention relates to a fluid injection passage connected to a pressure vessel when the switching shaft is in the first switching position, wherein the pressure vessel comprises a container body for storing a liquid different from the liquid flowing into the liquid inlet hole and a propellant, a mount cap fixed to the container body by closing the opening of the container body, and a stem formed in an axial shape and having a liquid injection hole opening on one end face of the shaft, wherein the stem is movably arranged with respect to the mount cap, with one end face protruding from the mount cap and the other end face inserted into the container body, and the one end face is connected to the switching The fluid injection adapter according to claim 2 is characterized in that the other end face of the shaft body is inserted into the fluid injection passage, one end face of the shaft body is brought into contact with the stepped portion of the fluid injection passage, the liquid injection hole is connected to the fluid injection passage, the container body is moved toward the other end face of the switching shaft body with one end face of the stem in contact with the stepped portion, the stem is pushed into the container body, and as the stem is pushed into the container body, the liquid stored in the container body flows into the liquid injection hole due to the pressure of the propellant, and the liquid injection hole injects the liquid that has flowed in from the container body into the fluid injection passage. [Effects of the Invention]

[0010] According to the present invention, by positioning the switching shaft in the first switching position, the liquid inlet passage is blocked from each liquid inlet hole and each fluid injection hole, and the fluid injection passage is connected to each fluid injection hole, allowing various functional liquids such as moisturizing liquids to flow into the fluid injection passage. The various functional liquids such as moisturizing liquids that have flowed into the fluid injection passage are then directed through the fluid injection passage and each fluid injection hole in that order, and injected (stored) into the liquid flow passage (liquid outlet hole) of the shower body. [Brief explanation of the drawing]

[0011] [Figure 1] This is a diagram showing a fluid injection adapter, with the switching shaft positioned in the first switching position (perspective view). [Figure 2] This is a diagram showing a fluid injection adapter, a front view with the switching shaft positioned at the first switching position. [Figure 3] A left side view of a fluid injection adapter showing the switching shaft body in the first switching position. [Figure 4] A left side view of a fluid injection adapter showing the switching shaft body in the first switching position. [Figure 5] A cross-sectional view taken along the line A-A of FIG. 3. [Figure 6] An enlarged view of part B of FIG. 5. [Figure 7] A cross-sectional view taken along the line C-C of FIG. 5. [Figure 8] A cross-sectional view taken along the line D-D of FIG. 5. [Figure 9] A cross-sectional view taken along the line E-E of FIG. 5. [Figure 10] A front view of a fluid injection adapter showing the switching shaft body in the second switching position. [Figure 11] A left side view of a fluid injection adapter showing the switching shaft body in the second switching position. [Figure 12] A cross-sectional view taken along the line F-F of FIG. 11. [Figure 13] An enlarged view of part G of FIG. 12. [Figure 14] A cross-sectional view taken along the line H-H of FIG. 12. [Figure 15] A cross-sectional view taken along the line I-I of FIG. 12. [Figure 16] A cross-sectional view taken along the line J-J of FIG. 12. [Figure 17] A front view showing the adapter body. [Figure 18] A left side view showing the adapter body. [Figure 19] A right side view showing the adapter body. [Figure 20] A plan view showing the adapter body. [Figure 21] A bottom view showing the adapter body. [Figure 22] A cross-sectional view taken along the line K-K of FIG. 17 [Figure 23] A cross-sectional view taken along the line L-L of FIG. 17. [Figure 24] A cross-sectional view taken along the line M-M of FIG. 18. [Figure 25] (a) is a front view showing the switching axis, and (b) is a top view showing the switching axis. [Figure 26] (a) is a bottom view showing the switching axis, and (b) is a cross-sectional view of NN in Figure 25(b). [Figure 27] This is a plan view showing the switching shaft. [Figure 28] This is a bottom view showing the switching shaft. [Figure 29] (a) is a left side view showing the switching shaft, and (b) is a right side view showing the switching shaft. [Figure 30] This is a cross-sectional view taken along line O-O in Figure 27. [Figure 31] This is an enlarged view of section P in Figure 30. [Figure 32] This is a diagram showing a shower device, a front view with the switching shaft positioned at the first switching position. [Figure 33] This is a diagram showing a shower device, and is a left side view with the switching shaft positioned in the first switching position. [Figure 34] Figure 33 is a cross-sectional view of the RR, with the switching shaft in the first switching position. [Figure 35] This is an enlarged view of section S in Figure 34. [Figure 36] Figure 33 is a cross-sectional view of the RR section, showing the switching shaft positioned at the second switching position. [Figure 37] This is an enlarged view of section T in Figure 36. [Figure 38] This is a front view showing a shower device and a pressure vessel, with the switching shaft positioned at the first switching position. [Figure 39] This is a diagram showing a shower device and a pressure vessel, with the switching shaft positioned in the first switching position (left view). [Figure 40] Figure 39 is a cross-sectional view of the UU. [Figure 41] This is an enlarged view of section V in Figure 40. [Figure 42] This is a cross-sectional view showing a pressure vessel (pressure can). [Figure 43]Figure 42 is an enlarged view of section W, where (a) shows the valve stem with the stem lateral hole closed, and (b) shows the valve stem pushed into the container body. [Modes for carrying out the invention]

[0012] The shower device and fluid injection adapter according to the present invention will be described with reference to Figures 1 to 43.

[0013] In Figures 1 to 41, the shower device X comprises a fluid injection adapter Y and a shower head Z.

[0014] As shown in Figures 1 to 41, the fluid injection adapter Y (switching valve) comprises an adapter body 1 (valve body) and a switching shaft 2.

[0015] As shown in Figures 17 to 24, the adapter body 1 includes a guide cylinder 5 (guide cylinder section), a liquid inlet cylinder 6 (liquid inlet cylinder section), a liquid outlet cylinder 7 (liquid outlet cylinder section), and a joint cylinder 8 (joint cylinder section).

[0016] The guide cylinder 5 (axis guide) is formed in a cylindrical shape, as shown in Figures 17 to 24. The guide cylinder 5 has an axis hole 11, a plurality (e.g., four) of liquid inlet holes 12, a plurality (e.g., four) of fluid injection holes 13 (fluid outlet holes), and a pair of guide grooves 14, 15 (guide grooves).

[0017] The shaft hole 11 is formed in the guide cylinder 5, as shown in Figures 18, 19 and 22 to 24. The shaft hole 11 is formed in a circular shape and is positioned concentrically with the guide cylinder 5. The shaft hole 11 penetrates the guide cylinder 5 in the direction A of the centerline a of the guide cylinder 5 and opens at each end face 5A, 5B (each end) of the guide cylinder 5.

[0018] Each liquid inlet hole 12 is formed in the guide cylinder 5, as shown in Figures 21, 22, and 24. Each liquid inlet hole 12 is positioned on one end face 5A of the guide cylinder 5 with a hole spacing δ1 (first hole spacing) in the direction A of the cylinder centerline a (centerline a of the shaft hole 11) of the guide cylinder 5. Each liquid inlet hole 12 is arranged (parallel / positioned) in the circumferential direction of the guide cylinder 5 (shaft hole 11) with a hole circumferential spacing ε1 (first hole circumferential spacing) between them.

[0019] Each liquid inlet hole 12 has a hole length L1 in the direction A of the centerline a of the guide cylinder 5, as shown in Figure 21. Each liquid inlet hole 12 has a hole width H1 in the circumferential direction of the guide cylinder 5 (shaft hole 11).

[0020] As shown in Figures 22 and 24, each liquid introduction hole 12 penetrates the guide cylinder 5 in a direction perpendicular (intersecting) to the cylinder centerline a of the guide cylinder 5 (centerline a of the shaft hole 11) and opens to the shaft hole 11 (inner circumferential surface 5a of the guide cylinder 5) and the outer circumferential surface 5b of the guide cylinder 5.

[0021] Each fluid injection hole 13 is formed in the guide cylinder 5 as shown in Figures 20, 23, and 24. Each fluid injection hole 13 is positioned in the direction A of the cylinder centerline a of the guide cylinder 5 (centerline a of the shaft hole 11) with a hole spacing δ2 (second hole spacing) between each liquid introduction hole 12 and each fluid injection hole 13. Each fluid injection hole 13 is positioned in the direction A of the cylinder centerline a of the guide cylinder 5 with a hole spacing δ3 (third hole spacing) between the other end face 5B of the guide cylinder 5 and each fluid injection hole 13.

[0022] As shown in Figures 22 to 24, each fluid injection hole 13 is positioned in the guide cylinder 5 with an angle [for example, angle: 180° (180 degrees)] between each liquid introduction hole 12 and each fluid injection hole 13 in the circumferential direction of the shaft hole 11 (guide cylinder 5). As shown in Figure 20, each fluid injection hole 13 is arranged (parallel / positioned) with a hole circumferential spacing ε2 (second hole circumferential spacing) between each fluid injection hole 13 in the circumferential direction of the guide cylinder 5 (shaft hole 11).

[0023] Each fluid injection hole 13 has a hole length L2 in the direction A of the centerline a of the guide cylinder 5, as shown in Figure 20. Each fluid injection hole 13 has a hole width H2 in the circumferential direction of the guide cylinder 5.

[0024] As shown in Figures 23 and 24, each fluid injection hole 13 penetrates the guide cylinder 5 in a direction perpendicular (intersecting) to the cylinder centerline a of the guide cylinder 5 (the centerline a of the shaft hole 11) and opens into the shaft hole 11 (the inner circumferential surface 5a of the guide cylinder 5) and the outer circumferential surface 5b of the guide cylinder 5.

[0025] Each guide hole groove 14, 15 is formed in the guide cylinder 5, as shown in Figures 18, 19, and 24. Each guide hole groove 14, 15 is positioned concentrically with the shaft hole 11 (guide cylinder 5). Each guide hole groove 14, 15 is formed in an annular (ring-shaped) form.

[0026] One of the guide holes 14 (first guide hole / first guide groove) is formed on one end surface 5A of the guide cylinder 5, as shown in Figures 18 and 24. The guide hole groove 14 is formed in the radial direction of the guide cylinder 5 (shaft hole 11) between the shaft hole 11 (inner circumferential surface 5a of the guide cylinder 5) and the outer circumferential surface 5b of the guide cylinder 5.

[0027] As shown in Figure 24, the guide hole groove 14 opens to one end face 5A of the guide cylinder 5, with a hole depth in the direction A of the cylinder centerline a of the guide cylinder 5, from one end face 5A to the other end face 5B. The guide hole groove 14 opens to one end face 5A of the guide cylinder 5, with a hole width in the radial direction of the guide cylinder 5. The guide hole groove 14 has a groove bottom surface 14A at a position with a hole depth from one end face 5A of the guide cylinder 5, in the direction A of the cylinder centerline a of the guide cylinder 5.

[0028] The other guide hole groove 15 (second guide hole groove / second guide groove) is located on the other end face 5B side of the guide cylinder 5, as shown in Figures 18 and 24. The guide hole groove 15 is formed in the radial direction of the shaft hole 11 (guide cylinder 5) between the shaft hole 11 (inner circumferential surface 5a of the guide cylinder 5) and the outer circumferential surface 5b of the guide cylinder 5.

[0029] As shown in Figure 24, the guide hole groove 15 opens to the other end face 5B of the guide cylinder 5, with a hole depth in the direction A of the cylinder centerline a of the guide cylinder 5, from the other end face 5B toward the one end face 5A. The guide hole groove 15 opens to the other end face 5B of the guide cylinder 5, with a hole width in the radial direction of the guide cylinder 5. The guide hole groove 15 has a groove bottom surface 15A at a position with a hole depth from the other end face 5B of the guide cylinder 5, in the direction A of the cylinder centerline a of the guide cylinder 5.

[0030] As shown in Figures 17 to 24, the liquid inlet cylinder 6 is formed in a cylindrical shape and fixed (placed) on the guide cylinder 5. The liquid inlet cylinder 6 has a liquid inlet hole 18. As shown in Figures 21, 22 and 24, the liquid inlet hole 18 is formed in the liquid inlet cylinder 6 and is positioned concentrically with the liquid inlet cylinder 6. The liquid inlet hole 18 penetrates the liquid inlet cylinder 6 in the direction E of the cylinder centerline e of the liquid inlet cylinder 6 and opens at each end face 6A, 6B (each end) of the liquid inlet cylinder 6.

[0031] As shown in Figures 21, 22, and 24, the liquid inlet cylinder 6 is positioned so that its centerline e (centerline e of the liquid inlet hole 18) intersects (is perpendicular to) the centerline a of the shaft hole 11 (centerline a of the guide cylinder 5). The liquid inlet cylinder 6 is positioned on the guide cylinder 5 in the direction A of the centerline a of the guide cylinder 5, with a gap λ1 between one end face 5A of the guide cylinder 5 and a gap λ2 between the other end face 5B of the guide cylinder 5. The liquid inlet cylinder 6 is fixed to the guide cylinder 5 by having one end face 6A of the liquid inlet cylinder 6 abut against the outer circumferential surface 5b of the guide cylinder 5, thereby closing the other end face 6A with the outer circumferential surface 5b of the guide cylinder 5.

[0032] As shown in Figures 21, 22, and 24, the liquid inlet cylinder 6 is positioned on the guide cylinder 5 (outer surface 5b of the guide cylinder 5) with liquid inlet holes 18 communicating with each liquid inlet hole 12. The liquid inlet holes 18 communicate with the shaft holes 11 (inside the guide cylinder 5) through each liquid inlet hole 12. Liquid (water) flows into the liquid inlet holes 18 from the other end surface 6B of the liquid inlet cylinder 6.

[0033] As shown in Figures 17 to 24, the liquid outlet cylinder 7 is formed in a cylindrical shape and fixed (placed) on the guide cylinder 5. The liquid outlet cylinder 7 has liquid outlet holes 19. As shown in Figures 20, 23, and 24, the liquid outlet holes 19 are formed in the liquid outlet cylinder 7 and are positioned concentrically with the liquid outlet cylinder 7. The liquid outlet holes 19 penetrate the liquid outlet cylinder 7 in the direction F of the cylinder's centerline f and open at each end face 7A, 7B (each end) of the liquid outlet cylinder 7.

[0034] As shown in Figures 23 and 24, the liquid outlet cylinder 7 is positioned on the guide cylinder 5 at an angle [for example, an angle of 180° (180 degrees)] between the liquid inlet cylinder 6 and the liquid outlet cylinder 7 in the circumferential direction of the guide cylinder 5. The liquid outlet cylinder 7 is positioned so that its cylinder centerline f (centerline f of the liquid outlet hole 19) intersects (orthogonally) with the hole centerline a of the shaft hole 11 (centerline a of the guide cylinder 5). In the direction A of the cylinder centerline a of the guide cylinder 5, the liquid outlet cylinder 7 is positioned on the guide cylinder 5 with a cylinder spacing λ1 between one cylinder end face 5A of the guide cylinder 5 and a cylinder spacing λ2 between the other cylinder end face 5B of the guide cylinder 5. The liquid discharge cylinder 7 is fixed to the guide cylinder 5 by having one end surface 7A of the liquid discharge cylinder 7 abut against the outer circumferential surface 5b of the guide cylinder 5, thereby closing the other end surface 7A with the outer circumferential surface 5b of the guide cylinder 5.

[0035] As shown in Figures 23 and 24, the liquid outlet cylinder 7 is positioned on the guide cylinder 5 (outer surface 5b of the guide cylinder 5) with liquid outlet holes 19 communicating with each fluid injection hole 13. The liquid outlet holes 19 communicate with the shaft holes 11 (inside the guide cylinder 5) through each fluid injection hole 13.

[0036] The joint cylinder 8 (connecting cylinder / connecting cylinder portion) is formed in a cylindrical shape (tube shape) as shown in Figures 1 to 6. The joint cylinder 8 has two end faces 8A and 8B (each joint cylinder end face) in the direction of the cylinder's centerline. The joint cylinder 8 has a liquid outlet hole 21 and a female threaded portion 22.

[0037] As shown in Figures 5 and 6, the liquid outlet hole 21 penetrates the joint cylinder 8 in the direction of the cylinder's centerline and opens at each cylinder end face 8A, 8B. The female thread portion 22 is located on one cylinder end face 8A side of the joint cylinder 8. The female thread portion 22 is formed on the inner circumferential surface of the joint cylinder 8 (the inner circumferential surface of the liquid outlet hole 21).

[0038] As shown in Figures 1 to 6, the joint cylinder 8 is inserted into the liquid outlet cylinder 7 (liquid outlet hole 19) from the other end face 7B of the liquid outlet cylinder 7, and is fixed to the liquid outlet cylinder 7. The joint cylinder 8 is fixed to the liquid outlet cylinder 7 by connecting the liquid outlet hole 21 from the other end face 8B to the liquid outlet hole 19.

[0039] As shown in Figures 1 to 6 and Figures 25 to 31, the switching shaft 2 includes a switching shaft 25, a plurality of rubber (synthetic resin) sealing rings 26, and a pair of buttons 27, 28 (push buttons).

[0040] The switching shaft 25 is formed in a circular shape (circular axis), as shown in Figures 25 and 26. The switching shaft 25 has a plurality (for example, four) of seal grooves 31 to 34. Each seal groove 31 to 34 is positioned between the respective shaft ends 25A and 25B of the switching shaft 25 in the direction G of the axial centerline g of the switching shaft 25.

[0041] As shown in Figures 25 and 26, the seal groove 31 (first seal groove) is located between the shaft ends 25A and 25B of the switching shaft 25, with a gap (a gap between the seal groove 31 and the shaft end 25A) between the one shaft end 25A of the switching shaft 25 in the direction G of the axis centerline g of the switching shaft 25. The seal groove 32 (second seal groove) is located between the seal groove 31 and the other shaft end 25B of the switching shaft 25, with a gap (a gap between each seal groove 31, 32) between the seal groove 31 and the other shaft end 25B of the switching shaft 25, with a gap (a gap between each seal groove 32, 32) between the seal groove 32 and the other shaft end 25B of the switching shaft 25, in the direction G of the axis centerline g of the switching shaft 25. The seal groove 34 (fourth seal groove) is positioned between the seal groove 33 and the other end 25B of the switching shaft 25, with a gap (a gap between each seal groove 33, 34) between them, in the direction G of the axis centerline g of the switching shaft 25.

[0042] As shown in Figures 25 and 26, each seal groove 31 to 34 opens onto the outer circumferential surface 25a of the switching shaft 25, with a groove depth extending from the outer circumferential surface 25a of the switching shaft 25 toward the axis centerline g in the radial direction of the switching shaft 25. Each seal groove 31 to 34 is formed on the switching shaft 25 in the circumferential direction of the switching shaft 25.

[0043] Each seal ring 26 is fitted into each seal groove 31-34, as shown in Figure 26(b), and mounted (positioned) on the switching shaft 25.

[0044] One of the buttons 27 (first button) has an outer cylindrical portion 41 (first outer cylindrical portion), a closing portion 42 (first closing portion), an inner cylindrical portion 43 (first inner cylindrical portion), and a plurality of ribs 44, as shown in Figures 27 to 30.

[0045] The outer cylindrical portion 41 is formed in a cylindrical shape. As shown in Figures 27, 28, and 30, the outer cylindrical portion 41 has cylindrical end faces 41A and 41B in the direction of the cylindrical centerline of the outer cylindrical portion 41.

[0046] The closing portion 42 is formed in a circular shape (circular plate). As shown in Figure 30, the closing portion 42 (first closing plate) has plate surfaces 42A and 42B in the plate thickness direction. The closing portion 42 is arranged concentrically with the outer cylindrical portion 41. The closing portion 42 closes one of the cylindrical end surfaces 41A of the outer cylindrical portion 41 by abutting its back surface 42B against the outer cylindrical portion 41. The closing portion 42 is fixed to the outer cylindrical portion 41.

[0047] As shown in Figure 30, the inner cylindrical portion 43 is formed in a cylindrical shape. The outer diameter of the inner cylindrical portion 43 is smaller than the inner diameter of the outer cylindrical portion 41. The inner cylindrical portion 43 has two end faces 43A and 43B in the direction of the centerline of the inner cylindrical portion 43. The inner cylindrical portion 43 is concentric with the outer cylindrical portion 41 and is positioned inside the outer cylindrical portion 41. The inner cylindrical portion 43 is fixed to the closing portion 42 (closing plate) by having one end face 43A of the inner cylindrical portion 43 abut against the back surface 42B of the closing portion 42. In the radial direction of the inner cylindrical portion 43, the inner cylindrical portion 43 is positioned to protrude into the outer cylindrical portion 41 from the closing portion 42 (back surface 42B of the plate) with a gap between the outer surface 43b of the inner cylindrical portion 43 and the inner surface 41a of the outer cylindrical portion 41.

[0048] As shown in Figure 30, each rib 44 is positioned at an angle between them in the circumferential direction of the outer cylindrical portion 41. Each rib 44 is positioned between the inner circumferential surface 41a of the outer cylindrical portion 41 and the outer circumferential surface 43b of the inner cylindrical portion 43 in the radial direction of the outer cylindrical portion 41, and is fixed to the outer cylindrical portion 41 (inner circumferential surface 41a). Each rib 44 is positioned at a distance between the other cylindrical end surface 41B of the outer cylindrical portion 41 and each rib 44 in the direction of the cylindrical centerline of the outer cylindrical portion 41. Each rib 44 protrudes into the outer cylindrical portion 41 from the back surface 42B of the closing portion 42 in the direction of the cylindrical centerline of the outer cylindrical portion 41, and is fixed to the closing portion 42 (back surface 42B of the plate).

[0049] One of the buttons 27 (the first push button) is positioned (mounted) on one of the shaft ends 25A of the switching shaft 25 (between one shaft end 25A and the seal groove 31), as shown in Figures 27, 28, and 30. The button 27 is positioned concentrically with the switching shaft 25. The button 27 is inserted into one of the shaft ends 25A of the switching shaft 25 from the other end face 41B of the outer cylindrical portion 41 and fitted onto one of the shaft ends 25A of the switching shaft 25. The button 27 is inserted into the inner cylindrical portion 43 from the other end face 43B of the inner cylindrical portion 43 (removably inserted) and fixed to the switching shaft 25 (one of the shaft ends 25A). The button 27 is fixed to the switching shaft 25 (on one end 25A) with a gap between the inner circumferential surface 41a of the outer cylindrical portion 41 and the outer circumferential surface 25a of the switching shaft 25 in the radial direction of the switching shaft 25.

[0050] In one button 27, as shown in Figure 30, the outer cylindrical portion 41 is positioned concentrically with the switching shaft 25 by inserting one end 25A of the switching shaft 25 from the other end surface 41A of the outer cylindrical portion 41. The outer cylindrical portion 41 is positioned with a gap between the inner circumferential surface 41a of the outer cylindrical portion 41 and the outer circumferential surface 25a of the switching shaft 25 in the radial direction of the outer cylindrical portion 41 (switching shaft 25).

[0051] In one button 27, as shown in Figure 30, the inner cylinder portion 43 is fitted onto one end 25A of the switching shaft 25 from the other end 43B of the inner cylinder portion 43, and is positioned concentrically with the switching shaft 25. The inner cylinder portion 43 is fixed to the switching shaft 25 (one end 25A) by inserting (removably inserting) one end 25A of the switching shaft 25 into the inner cylinder portion 43 from the other end 43B of the inner cylinder portion 43.

[0052] As shown in Figure 30, one end 25A of the switching shaft 25 is inserted into the outer cylindrical portion 41 from the other end surface 41B, with a gap between the outer circumferential surface 25a of the switching shaft 25 and the inner circumferential surface 41a of the outer cylindrical portion 41 in the radial direction of the switching shaft 25 (outer cylindrical portion 41). The other end 25A of the switching shaft 25 is inserted into the inner cylindrical portion 43 from the other end surface 43B (removably inserted) and fixed to the inner cylindrical portion 43. The one end 25A of the switching shaft 25 is inserted into the inner cylindrical portion 43 with one end 25A in contact with the back surface 42B of the plate of the closing portion 42. In the switching shaft 2, the plate surface 42A of the closing portion 42 becomes the shaft end surface 2A of the switching shaft 2, as shown in Figures 27 to 30.

[0053] The other button 28 (second button) has an outer cylindrical portion 51 (second outer cylindrical portion), a closing portion 52 (second closing portion), and an inner cylindrical portion 53 (second inner cylindrical portion), as shown in Figures 27 to 30.

[0054] The outer cylindrical portion 51 is formed in a cylindrical shape, as shown in Figures 27, 28, and 30. The outer cylindrical portion 51 has cylindrical end faces 51A and 51B in the direction of the centerline of the outer cylindrical portion 51.

[0055] The closing portion 52 is formed in a circular shape (circular plate). As shown in Figure 30, the closing portion 52 (second closing plate) has plate surfaces 52A and 52B in the plate thickness direction. The closing portion 52 is arranged concentrically with the outer cylindrical portion 51. The closing portion 52 closes one of the cylindrical end surfaces 51A of the outer cylindrical portion 51 by abutting its back surface 52B against the outer cylindrical portion 51. The closing portion 52 is fixed to the outer cylindrical portion 51.

[0056] As shown in Figure 30, the inner cylindrical portion 53 is formed in a cylindrical shape. The outer diameter of the inner cylindrical portion 53 is smaller than the inner diameter of the outer cylindrical portion 51. The inner cylindrical portion 53 has two end faces 53A and 53B in the direction of the centerline of the inner cylindrical portion 43. The inner cylindrical portion 53 is concentric with the outer cylindrical portion 51 and is positioned inside the outer cylindrical portion 51. The inner cylindrical portion 53 is fixed to the closing portion 52 (closing plate) by having one end face 53A of the inner cylindrical portion 53 abut against the back surface 52B of the closing portion 52. In the radial direction of the inner cylindrical portion 53, the inner cylindrical portion 53 is positioned to protrude into the outer cylindrical portion 51 from the closing portion 52 (back surface 52B of the plate) with a gap between the outer surface 53b of the inner cylindrical portion 53 and the inner surface 51a of the outer cylindrical portion 51.

[0057] The other button 28 (second push button) is positioned (mounted) on the other shaft end 25B side of the switching shaft 25 (between the other shaft end 25B and the seal groove 34), as shown in Figure 30. The button 28 is positioned concentrically with the switching shaft 25. The button 28 is inserted into the other shaft end 25B side of the switching shaft 25 from the other cylindrical end face 51B of the outer cylindrical portion 51 and fitted onto the other shaft end 25B side of the switching shaft 25. The button 28 is inserted into the inner cylindrical portion 43 (removably inserted) from the other cylindrical end face 51B of the inner cylindrical portion 53 and fixed to the switching shaft 25 (the other shaft end 25B side). The button 28 is fixed to the switching shaft 25 (on the other shaft end 25B side) with a gap between the inner circumferential surface 51a of the outer cylindrical portion 51 and the outer circumferential surface 25a of the switching shaft 25 in the radial direction of the switching shaft 25.

[0058] In the other button 28, as shown in Figures 30 and 31, the outer cylindrical portion 51 is inserted from the other cylindrical end face 51B of the outer cylindrical portion 51 to the other shaft end 25B of the switching shaft 25, and is positioned concentrically with the switching shaft 25. The outer cylindrical portion 51 is positioned in the radial direction of the outer cylindrical portion 51 (switching shaft 25) with a gap between the inner circumferential surface 51a of the outer cylindrical portion 51 and the outer circumferential surface 25a of the switching shaft 25.

[0059] In the other button 28, as shown in Figures 30 and 31, the inner cylinder portion 53 is fitted onto the other end of the switching shaft 25, from the other end of the inner cylinder portion 53B to the other end of the switching shaft 25, and is positioned concentrically with the switching shaft 25. The inner cylinder portion 53 is fixed to the switching shaft 25 (the other end of the shaft 25B) by inserting (removably inserting) the other end of the switching shaft 25, from the other end of the inner cylinder portion 53B to the other end of the inner cylinder portion 53.

[0060] As shown in Figure 30, the other end 25B of the switching shaft 25 is inserted into the outer cylindrical portion 51 from the other end surface 51B, with a gap between the outer circumferential surface 25a of the switching shaft 25 and the inner circumferential surface 51a of the outer cylindrical portion 51 in the radial direction of the switching shaft 25 (outer cylindrical portion 51). The other end 25B of the switching shaft 25 is inserted into the inner cylindrical portion 53 from the other end surface 53B (removably inserted) and fixed to the inner cylindrical portion 53. The other end 25B of the switching shaft 25 is inserted into the inner cylindrical portion 53 with the other end 25B in contact with the back surface 52B of the plate of the closing portion 52. In the switching shaft 2, the plate surface 52A of the closing portion 52 becomes the other shaft end surface 2B of the switching shaft 2.

[0061] As shown in Figures 25, 26, 30, and 31, the switching shaft 2 has a liquid inlet passage γ1 and a fluid injection passage γ2.

[0062] As shown in Figures 25, 26, and 30, the liquid inlet passage γ1 is positioned at a distance from one end face 2A (plate surface 42A of the closure portion 42) of the switching shaft body 2 (switching shaft 25) in the direction G of the axial centerline g of the switching shaft body 2 (switching shaft 25). The liquid inlet passage γ1 penetrates the switching shaft body 2 (switching shaft 25) and opens to the outer circumferential surface 25a of the switching shaft body 2 (switching shaft 25).

[0063] The liquid inlet passage γ1 is formed in the switching shaft 25 (switching shaft body 2). The liquid inlet passage γ1 includes, for example, a liquid inlet horizontal hole 61, a first liquid inlet vertical hole 62, and a second liquid inlet vertical hole 63.

[0064] The liquid inlet lateral hole 61 is positioned concentrically with the switching shaft 25. As shown in Figures 26(b) and 30, the liquid inlet lateral hole 61 is formed within the switching shaft 25, with its diameter centered on the axial centerline g of the switching shaft 25 and extending in the radial direction of the switching shaft 25 (direction perpendicular to the axial centerline g). The liquid inlet lateral hole 61 is positioned on one shaft end 25A side of the switching shaft 25. The liquid inlet lateral hole 61 is formed in the switching shaft 25 (switching shaft body 2) extending in the direction G of the axial centerline g of the switching shaft 25. The liquid inlet lateral hole 61 is formed extending from between the seal grooves 32, 32 to the seal groove 31 and one shaft end 25A in the direction G of the axial centerline g of the switching shaft 25.

[0065] As shown in Figures 25, 26(a), and 30, the first liquid inlet vertical hole 62 is positioned between the seal grooves 32 and 33 in the direction G of the axial centerline g of the switching shaft 25 (switching shaft body 2). The first liquid inlet vertical hole 62 is formed between the outer circumferential surface 25a of the switching shaft 25 and the liquid inlet horizontal hole 61 in the direction perpendicular to the axial centerline g of the switching shaft 25 (radial direction of the switching shaft 25). The first liquid inlet vertical hole 62 opens onto the outer circumferential surface 25a of the switching shaft 25 (switching shaft body 2) and communicates with the liquid inlet horizontal hole 61. The first liquid inlet vertical hole 62 has a hole width HA in the direction G of the axial centerline g of the switching shaft 25 and a hole length LA in the circumferential direction of the switching shaft 25. The first liquid inlet vertical hole 62 (liquid inlet passage γ1) has a first inlet 62A that opens onto the outer circumferential surface 25a of the switching shaft 25 (switching shaft body 2). The first inlet 62A has a width HA in the direction G of the axial centerline g of the switching shaft 25 (switching shaft body 2) and a length LA in the circumferential direction of the switching shaft 25 (switching shaft body 2), and opens onto the outer circumferential surface 25a of the switching shaft 25 (switching shaft body 2).

[0066] As shown in Figures 25(a), 26, and 30, the second liquid inlet vertical hole 63 is positioned between the first liquid inlet vertical hole 62 and one shaft end 25A of the switching shaft 25 (one shaft end face 2A of the switching shaft 2) in the direction G of the axial centerline g of the switching shaft 25 (switching shaft body 2), with a gap (a gap between the first and second liquid inlet vertical holes 62 and 63) between them. The second liquid inlet vertical hole 63 is positioned between the seal grooves 31 and 32 in the direction G of the axial centerline g of the switching shaft 25. The second liquid inlet vertical hole 63 is positioned at an angle [for example, an angle of 180° (180 degrees)] between the first and second liquid inlet vertical holes 62 and 63 in the circumferential direction of the switching shaft 25 (switching shaft body 2).

[0067] As shown in Figures 25(a), 26, and 30, the second liquid inlet vertical hole 63 is formed between the outer circumferential surface 25a of the switching shaft 25 and the liquid inlet horizontal hole 61 in a direction perpendicular to the axial centerline g of the switching shaft 25 (radial direction of the switching shaft 25). The second liquid inlet vertical hole 63 opens to the outer circumferential surface 25a of the switching shaft 25 (switching shaft body 2) and communicates with the liquid inlet horizontal hole 61. The second liquid inlet vertical hole 63 has a hole width HA in the direction G of the axial centerline g of the switching shaft 25 and a hole length L2 in the circumferential direction of the switching shaft 25. The second liquid inlet vertical hole 63 has a second inlet 63A that opens to the outer circumferential surface 25a of the switching shaft 25 (switching shaft body 2). The second inlet 63A opens onto the outer circumferential surface 25a of the switching shaft 25 (switching shaft body 2) at an angle [for example, angle: 180° (180 degrees)] between the first and second inlets 62A and 63A in the circumferential direction of the switching shaft 25 (switching shaft body 2). The second inlet 63A has an opening width HA in the direction G of the axial centerline g of the switching shaft 25 (switching shaft body 2) and an opening length LA in the circumferential direction of the switching shaft 25 (switching shaft body 2), and opens onto the outer circumferential surface 25a of the switching shaft 25 (switching shaft body 2).

[0068] As shown in Figures 25, 26, 30, and 31, the fluid injection passage γ2 is positioned between the liquid inlet passage γ1 and the other shaft end face 2B (plate surface 52A of the closure section 52) of the switching shaft 2 (switching shaft 25), with a gap (a gap between the liquid inlet passage γ1 and the fluid injection passage γ2) in the direction G of the axial centerline g of the switching shaft 2 (switching shaft 25). The fluid injection passage γ2 penetrates the switching shaft 2 (switching shaft 2 and closure section 52), opens on the outer circumferential surface 25a of the switching shaft 2 (switching shaft 25), and opens on the other shaft end face 2B (plate surface 52A of the closure section 52) of the switching shaft 2.

[0069] As shown in Figures 30 and 31, the fluid injection passage γ2 has a diameter dA in the radial direction (direction perpendicular to the axis centerline g) of the switching shaft 2, centered on the axis centerline g of the switching shaft 2, and opens to the other shaft end face 2B of the switching shaft 2. The fluid injection passage γ2 has a stepped portion M at a position separated by a flow path length LB (distance) from the other shaft end face 2B of the switching shaft 2 in the direction G of the axis centerline g of the switching shaft 2, and penetrates the switching shaft 2 to open to the outer circumferential surface 25a of the switching shaft 2.

[0070] As shown in Figures 30 and 31, the fluid injection passage γ2 is formed, for example, on the switching shaft 25 and the button 28 (blocking portion 52). The fluid injection passage γ2 has, for example, a fluid injection horizontal hole 71 and a fluid injection vertical hole 72.

[0071] As shown in Figures 30 and 31, the fluid injection lateral hole 71 is formed in the switching shaft 25 and the closing portion 52 (button 28), with a hole diameter in the radial direction of the switching shaft 25, centered on the axis centerline g of the switching shaft 25. The fluid injection lateral hole 71 is concentric with the switching shaft 25 and the closing portion 52. In the direction G of the axis centerline g of the switching shaft 25, the fluid injection lateral hole 71 is positioned between the other axis end face 2B of the switching shaft body 2 (plate surface 52A of the closing portion 52) and the first liquid inlet vertical hole 62, separated by a gap (a gap between the first liquid inlet vertical hole 62 and the fluid injection lateral hole 71). In the direction G of the axis centerline g of the switching shaft 25, the fluid injection lateral hole 71 is formed extending from the other axis end face 2B of the switching shaft body 2 (plate surface 52A of the closing portion 52) through the closing portion 52 and onto the switching shaft 25. The fluid injection lateral hole 71 is opened in the other shaft end face 2B of the switching shaft body 2 (plate surface 52A of the closed portion 52).

[0072] As shown in Figures 30 and 31, the fluid injection lateral hole 71 has a hole diameter dA in the radial direction of the switching shaft 2 (in the direction perpendicular to the axis centerline g) with respect to the axis centerline g of the switching shaft 2, and opens to the plate surface 52A of the closure portion 52 (the other shaft end face 2B of the switching shaft 2). The fluid injection lateral hole 71 is formed in the closure portion 52 and the switching shaft 25 on the other shaft end face 2B side of the switching shaft 2 [between the back surface 52B of the closure portion 52 and the seal groove 33 (first liquid inlet vertical hole 62 / liquid inlet passage γ1)].

[0073] As shown in Figures 30 and 31, the fluid injection lateral hole 71 has, for example, a first lateral hole portion 73 and a second lateral hole portion 74.

[0074] As shown in Figures 30 and 31, the first horizontal hole 73 has a hole diameter dA in the radial direction of the switching shaft 2 (in the direction perpendicular to the axis centerline g) with the axis centerline g of the switching shaft 2 as its center, and opens to the plate surface 52A of the closure section 52 (the other axis end face 2B of the switching shaft 2). In the direction G of the axis centerline g of the switching shaft 25, the first horizontal hole 73 has a stepped portion M at a position separated by a hole length LB (distance) from the plate surface 52A of the closure section 52 (the other axis end face 2B of the switching shaft 2), and is reduced in diameter, passing through the closure section 52 and opening to the back surface 52B of the closure section 52. The first horizontal hole 73 (fluid injection passage γ2 / fluid injection horizontal hole 71) has an injection port 73A that opens to the other axis end face 2B of the switching shaft 2 (the plate surface 52A of the closure section 52). The inlet 73A is opened on the other shaft end face 2B of the switching shaft 2 (the plate surface 52A of the closing portion 52).

[0075] As shown in Figures 30 and 31, the second horizontal hole 74 is positioned concentrically with the first horizontal hole 73. The second horizontal hole 74 opens at the other shaft end 25B of the switching shaft 25 and communicates with the first horizontal hole 73. In the direction G of the axial centerline g of the switching shaft 25, the second horizontal hole 74 extends from the other shaft end 25B toward the one shaft end 25A of the switching shaft 25 and is formed between the other shaft end 25B and the first liquid inlet vertical hole 62 (seal groove 33).

[0076] As shown in Figures 25, 26(b), 30, and 31, the fluid injection vertical hole 72 is positioned between the first liquid inlet vertical hole 62 (liquid inlet passage γ1) and the other shaft end face 2B (plate surface 52A of the closure section 52) of the switching shaft 2, with a gap (a gap between the fluid injection vertical hole 72 and the first liquid inlet vertical hole 62) in the direction G of the axial centerline g of the switching shaft 25 (switching shaft body 2), and with a gap (a gap between the fluid injection vertical hole 72 and the first liquid inlet vertical hole 62) in the direction G of the axial centerline g of the switching shaft 25 (switching shaft body 2). The fluid injection vertical hole 72 is positioned between the seal grooves 33 and 34 in the direction G of the axial centerline g of the switching shaft 25 (switching shaft body 2). The fluid injection vertical hole 72 is positioned at the same location as the first liquid inlet vertical hole 62 in the circumferential direction of the switching shaft 25. The fluid injection vertical hole 72 is positioned in the circumferential direction of the switching shaft 25, separated from the second liquid inlet vertical hole 63 by an angle [for example, an angle of 180° (180°)].

[0077] As shown in Figures 25, 26(b), and 30, the fluid injection vertical hole 72 is positioned between the outer circumferential surface 25a of the switching shaft 25 and the fluid injection horizontal hole 71 (second horizontal hole portion 74) in a direction perpendicular to the axial centerline g of the switching shaft 25 (radial direction of the switching shaft 25). The fluid injection vertical hole 72 opens onto the outer circumferential surface 25a of the switching shaft 25 (switching shaft body 2) and communicates with the fluid injection horizontal hole 71 (second horizontal hole portion 74). The fluid injection vertical hole 72 has a fluid inlet 72A that opens onto the outer circumferential surface 25a of the switching shaft 25 (switching shaft body 2). The fluid inlet 72A is positioned at the same location as the first inlet 62A in the circumferential direction of the switching shaft 25 (switching shaft body 2) and opens onto the outer circumferential surface 25a of the switching shaft 25. The fluid inlet 72A is opened on the outer circumferential surface 25a of the switching shaft 25 (switching shaft body 2) at an angle [for example, angle: 180° (180 degrees)] between the fluid inlet 72A and the second inlet 63A in the circumferential direction of the switching shaft 25 (switching shaft body 2). The fluid inlet 72A has a mouth width HA in the direction G of the axial centerline g of the switching shaft 25 (switching shaft body 2) and a mouth length LA in the circumferential direction of the switching shaft 25 (switching shaft body 2), and is opened on the outer circumferential surface 25a of the switching shaft 25 (switching shaft body 2).

[0078] As shown in Figures 1 to 6, the switching shaft 2 is positioned in the adapter body 1 (guide cylinder 5). The switching shaft 2 is inserted into the shaft hole 11 with one shaft end face 2A protruding from one cylinder end face 5A of the guide cylinder 5 and the other shaft end face 2B protruding from the other cylinder end face 5B of the guide cylinder 5. The switching shaft 2 is positioned in the shaft hole 11 (inside the guide cylinder 5) so as to be movable relative to the guide cylinder 5 (shaft hole 11) in the direction A of the cylinder centerline a of the guide cylinder 5.

[0079] As shown in Figures 1 to 6, the switching shaft 2 is positioned (mounted) on the adapter body 1 (guide cylinder 5) by inserting the switching shaft 25 into the shaft hole 11 (inside the guide cylinder 5), with the switching shaft 25 inserted into the shaft hole 11 (inside the guide cylinder 5). The switching shaft 2 is positioned by inserting the switching shaft 25 into the shaft hole 11 while each seal ring 26 is in contact (pressure contact) with the inner circumferential surface of the shaft hole 11 (inside circumferential surface of the guide cylinder 5).

[0080] As shown in Figures 5 and 6, the switching shaft 2 is positioned (mounted) on the guide cylinder 5 by inserting the switching shaft 25 into the shaft hole 11 (inside the guide cylinder 5) so that it can move relative to the guide cylinder 5 in the direction A of the centerline a of the guide cylinder 5. The switching shaft 2 is positioned (mounted) on the guide cylinder 5 by inserting the switching shaft 25 into the shaft hole 11 (inside the guide cylinder 5) so that the first inlet 62A of the first liquid inlet vertical hole 62 (liquid inlet passage γ1) and the fluid inlet 72A of the fluid injection vertical hole 72 (fluid injection passage γ2) face the respective fluid injection holes 13, and the second inlet 63A of the second liquid inlet vertical hole 63 (liquid inlet passage γ1) face the respective liquid introduction holes 12.

[0081] As shown in Figures 5 and 6, the switching shaft 25 is inserted into the shaft hole 11 of the guide cylinder 5 (shaft hole 11) so as to be movable in the direction A of the centerline a of the guide cylinder 5. The switching shaft 25 is inserted into the shaft hole 11 by pressing the seal rings 26 in each seal groove 31 to 34 against the inner circumferential surface of the guide cylinder 5 (the inner circumferential surface of the shaft hole 11). The switching shaft 25 is inserted into the shaft hole 11 (inside the guide cylinder 5) with the first inlet 62A of the first liquid inlet vertical hole 62 (liquid inlet passage γ1) and the fluid inlet 72A of the fluid injection vertical hole 72 (fluid injection passage γ2) facing the respective fluid injection holes 13, and the second inlet 62A of the second liquid inlet vertical hole 63 facing the respective liquid introduction holes 12. The switching shaft 25 is positioned (mounted) on the guide cylinder 5 in the direction A of the centerline a of the guide cylinder 5, with one shaft end 25A protruding from one end face 5A of the guide cylinder 5 and the other shaft end 25B protruding from the other end face 5B of the guide cylinder 5.

[0082] As shown in Figures 3, 4, and 6, the switching shaft 2 is positioned (mounted) on the guide cylinder 5 by inserting the other end face 41B of the outer cylindrical portion 41 of the button 27 into the guide hole groove 14 from one end face 5A of the guide cylinder 5, and inserting the other end face 51B of the outer cylindrical portion 51 of the button 28 into the guide hole groove 15 from the other end face 5B of the guide cylinder 5. The switching shaft 2 is positioned (mounted) on the guide cylinder 5 by inserting the other end face 41B of the outer cylindrical portion 41 into the guide hole groove 14 with a gap between the outer circumferential surface 41b of the outer cylindrical portion 41 of the button 27 and the outer circumferential surface 14b of the hole in the guide hole groove 14, and with a gap between the inner circumferential surface 41a of the outer cylindrical portion 41 and the inner circumferential surface 14a of the hole in the guide hole groove 14. The switching shaft 2 is positioned (mounted) on the guide cylinder 5 by inserting the other end face 51B of the outer cylinder 51 into the guide hole groove 15, with a gap between the outer circumferential surface 51b of the outer cylinder 51 of the button 28 and the outer circumferential surface 15b of the guide hole groove 15, and a gap between the inner circumferential surface 51a of the outer cylinder 51 and the inner circumferential surface 15a of the guide hole groove 15.

[0083] As shown in Figure 6, the button 27 is positioned (mounted) on the guide cylinder 5 by inserting the other end face 41B of the outer cylinder portion 41 into the guide hole groove 14 from the one end face 5A of the guide cylinder 5, with each rib 44 facing the one end face 5A of the guide cylinder 5. The button 27 is positioned on the guide cylinder 5 by inserting the other end face 41B of the outer cylinder portion 41 into the guide hole groove 15, with a gap between the outer circumferential surface 41b of the outer cylinder portion 41 and the outer circumferential surface 14b of the guide hole groove 14, and a gap between the inner circumferential surface 41a of the outer cylinder portion 41 and the inner circumferential surface 14a of the guide hole groove 14.

[0084] As shown in Figure 6, the button 28 is positioned (mounted) on the guide cylinder 5 by inserting the other end face 51B of the outer cylinder 51 into the guide hole groove 15 from the other end face 5B of the guide cylinder 5, with the other end face 51B of the outer cylinder 51 facing the bottom surface 15A of the guide hole groove 15. The button 28 is positioned on the guide cylinder 5 by inserting the other end face 51B of the outer cylinder 51 into the guide hole groove 15 with a gap between the outer circumferential surface 51b of the outer cylinder 51 and the outer circumferential surface 15b of the guide hole groove 15, and with a gap between the inner circumferential surface 51a of the outer cylinder 51 and the inner circumferential surface 15a of the guide hole groove 15.

[0085] As shown in Figures 1 through 16, the switching shaft 2 moves between the first switching position P1 and the second switching position P2 in the direction A of the centerline a of the guide cylinder 5.

[0086] As shown in Figures 6 to 9, at the first switching position P1, the switching shaft 2 blocks (closes) the liquid inlet passage γ1 from each liquid inlet hole 12 and each fluid injection hole 13, and connects the fluid injection passage γ2 to each fluid injection hole 13 through an opening (fluid injection port 72A) on the outer circumferential surface 25a of the switching shaft 2 (switching shaft 25). At the first switching position P1, the switching shaft 2 blocks the first inlet 62A of the first liquid inlet vertical hole 62 (liquid inlet passage γ1) and the second inlet 63A of the second liquid inlet vertical hole 63 (liquid inlet passage γ1) with the inner circumferential surface 5a of the guide cylinder 5, thereby blocking the first and second liquid inlet vertical holes 62 and 63 (liquid inlet passage γ1) from each liquid inlet hole 12 and each fluid injection hole 13. At the first switching position P1, the switching shaft 2 has a fluid injection vertical hole 72 (fluid injection passage γ2) that communicates with each fluid injection hole 13 from an opening (fluid injection port 72A) on the outer circumferential surface 25a of the switching shaft 2, and a fluid injection horizontal hole 71 (fluid injection passage γ2) that communicates with the outside of the adapter body 1 (switching shaft 2).

[0087] As shown in Figure 6, at the first switching position P1, the other end face 2B of the switching shaft 2 abuts against the guide cylinder 5, and one end face 2A of the switching shaft 2 is separated from the guide cylinder 5. At the first switching position P1, the other end face 51B of the outer cylindrical portion 51 of the button 28 abuts against the groove bottom surface 15A of the guide hole groove 15, and each rib 44 of the button 27 is separated from one end face 5A of the guide cylinder 5.

[0088] As shown in Figures 13 to 16, at the second switching position P2, the switching shaft 2 blocks the fluid injection passage γ2 from each fluid injection hole 13 and connects the liquid inlet passage γ1 to each liquid inlet hole 12 and each fluid injection hole 13. At the second switching position P2, the switching shaft 2 blocks the fluid injection port 72A of the fluid injection vertical hole 72 (fluid injection passage γ2) with the inner circumferential surface 5a of the guide cylinder 5, thereby blocking the fluid injection vertical hole 72 (fluid injection passage γ2) from each fluid injection hole 13. The switching shaft 2 has a first liquid inlet vertical hole 62 (liquid inlet passage γ1) that communicates with each fluid injection hole 13 from an opening (first inlet 62A) on the outer circumferential surface 25a of the switching shaft 2 (switching shaft 25), and a second inlet vertical hole 63 (liquid inlet passage γ1) that communicates with each liquid introduction hole 12 from an opening (second inlet 63A) on the switching shaft 2 (switching shaft 25).

[0089] As shown in Figure 13, at the second switching position P2, the switching shaft 2 has one end face 2A of the switching shaft 2 in contact with the guide cylinder 5, and the other end face 2B of the switching shaft 2 is separated from the guide cylinder 5. At the second switching position P2, the switching shaft 2 has each rib 44 of the button 27 in contact with one end face 5A of the guide cylinder 5, and the other end face 51B of the outer cylinder portion 51 of the button 28 is separated from the groove bottom surface 15A of the guide hole groove 15.

[0090] As shown in Figures 1 to 16, the operator of the fluid injection adapter Y (switching shaft 2) pushes one shaft end face 2A (plate surface 42A of the closing portion 42) of the switching shaft 2, which is located at the first switching position P1, toward the guide cylinder 5, thereby moving the switching shaft 2 from the first switching position P1 to the second switching position P2. The shaft end face 2A side of the switching shaft 2 comes into contact with the guide cylinder 5 as the switching shaft 2 moves from the first switching position P1 to the second switching position P2, positioning the switching shaft 2 at the second switching position P2. Each rib 44 of the button 27 comes into contact with one cylinder end face 41A of the guide cylinder 5 as the switching shaft 2 moves from the first switching position P1 to the second switching position P2, positioning the switching shaft 2 at the second switching position P2.

[0091] As shown in Figures 1 to 16, the operator pushes the other end face 2B (plate surface 52A of the closing portion 52) of the switching shaft 2 located at the second switching position P2 toward the guide cylinder 5, thereby moving the switching shaft 2 from the second switching position P2 to the first switching position P1. The other end face 2B of the switching shaft 2 comes into contact with the guide cylinder 5 as the switching shaft 2 moves from the second switching position P2 to the first switching position P1, positioning the switching shaft 2 at the first switching position P1. The other end face 51A of the outer cylinder portion 51 of the button 28 comes into contact with the groove bottom surface 15A of the guide hole groove 15 as the switching shaft 2 moves from the second switching position P2 to the first switching position P1, positioning the switching shaft 2 at the first switching position P1.

[0092] As shown in Figures 1 to 16, the switching shaft 2 is moved from the first switching position P1 to the second switching position P2, or from the second switching position P2 to the first switching position P1, by pushing one shaft end face 2A (plate surface 42A of the closing portion 42) or the other shaft end face 2B (back surface 52 of the closing portion 52) toward the guide cylinder 5.

[0093] As shown in Figures 5, 6, 12, and 13, the fluid injection adapter Y allows liquid (water) to flow into the liquid inlet hole 18 from the other end face 6B of the liquid inlet cylinder 6.

[0094] In the fluid injection adapter Y, when the switching shaft 2 is moved from the first switching position P1 to the second switching position P2, the liquid that has flowed into the liquid inlet hole 18 flows through the liquid inlet hole 18 and flows out into each liquid inlet hole 12, as shown in Figures 13 and 14.

[0095] With the switching shaft 2 in the second switching position P2, the liquid that flows out into each liquid inlet hole 12 flows through each liquid inlet hole 12 and into the liquid inlet passage γ1, as shown in Figures 13 and 14. The liquid that flows out into each liquid inlet hole 12 flows into the second liquid inlet vertical hole 63 (liquid inlet passage γ1) from the second inlet 63A (opening on the outer circumferential surface 25a of the switching shaft 2).

[0096] With the switching shaft 2 in the second switching position P2, the liquid flowing into the liquid inlet passage γ1 flows through the liquid inlet passage γ1 and into each fluid injection hole 13, as shown in Figures 13 and 15. The liquid flowing through the liquid inlet passage γ1 flows into each fluid injection hole 13 from the opening (first inlet 62A) on the outer circumferential surface 25a of the switching shaft 2. The liquid flowing into the second liquid inlet vertical hole 63 flows in the order of the second liquid inlet vertical hole 63, the liquid inlet horizontal hole 61, and the first liquid inlet vertical hole 62, as shown in Figures 13 to 15, and flows into each fluid injection hole 13 from the first liquid inlet vertical hole 62. The liquid that has flowed through the first liquid inlet vertical hole 62 flows into each fluid injection hole 13 from the first inlet 62A (opening on the outer circumferential surface 25a of the switching shaft 2).

[0097] With the switching shaft 2 in the second switching position P2, the liquid that flows into each fluid injection hole 13 flows through each fluid injection hole 13 and flows out to the liquid outlet hole 19 from one end face 7A of the liquid outlet cylinder 7, as shown in Figures 13 and 15.

[0098] With the switching shaft 2 in the second switching position P2, the liquid that flows out into the liquid outlet hole 19 flows in the order of liquid outlet hole 19 and liquid discharge hole 21, as shown in Figures 12, 13, and 15, and is discharged (flows out) to the outside of the joint body 8 (liquid outlet cylinder 7) from one end face 8A of the joint cylinder 8 (the other end face 7B of the liquid outlet cylinder 7).

[0099] In the fluid injection adapter Y, when the switching shaft 2 is moved from the second switching position P2 to the first switching position P1, liquid is injected (flows) into the fluid injection passage γ2 from the inlet 73A of the fluid injection passage γ2, as shown in Figures 5 and 6. The liquid is injected (flows) into the fluid injection passage γ2 from the inlet 73A. The liquid is, for example, a different liquid from the liquid flowing into the liquid inlet hole 18, and is a variety of functional liquids such as moisturizing liquids, moisturizing cosmetic liquids, liquid surfactants (body soap), and cooling components such as menthol (hereinafter referred to as "moisturizing liquids, etc.").

[0100] With the switching shaft 2 in the first switching position P1, a moisturizing liquid or the like is injected into the first horizontal hole 73 (fluid injection horizontal hole 71) from the injection port 73A of the first horizontal hole 73 (fluid injection horizontal hole 71). The moisturizing liquid or the like is injected (flows into) the first horizontal hole 73 (fluid injection horizontal hole 71) from the injection port 73A.

[0101] With the switching shaft 2 in the first switching position P1, the humidifying liquid injected into the fluid injection passage γ2 flows through the fluid injection passage γ2 and into each fluid injection hole 13, as shown in Figures 6 and 9. The humidifying liquid injected into the first horizontal hole 73 (fluid injection horizontal hole 71) flows through the first horizontal hole 73, the second horizontal hole 74 (fluid injection horizontal hole 71), and the fluid injection vertical hole 72 in that order and into each fluid injection hole 13.

[0102] As shown in Figures 5, 6, and 9, the humidifying liquid and the like that flow into each fluid injection hole 13 flows through each fluid injection hole 13, flows out to the liquid outlet hole 19, and is injected (stored) into the liquid outlet hole 19 (liquid discharge hole 21).

[0103] In the fluid injection adapter Y, after injecting a moisturizing liquid or the like into the liquid outlet hole 19, when the switching shaft 2 is moved from the first switching position P1 to the second switching position P2, the liquid (water) that has flowed into the liquid inlet hole 18 flows in the same manner as described in Figures 12 to 15, through the liquid inlet hole 18, each liquid introduction hole 12, the liquid inlet passage γ1, and each fluid injection hole 13, and is discharged into the liquid outlet hole 19.

[0104] When a humidifying liquid or the like is injected into the liquid outlet hole 19 and the switching shaft 2 is positioned at the second switching position P2, the liquid (water) that flows out into the liquid outlet hole 19 is mixed with the humidifying liquid or the like injected (stored) into the liquid outlet hole 19, diluting the humidifying liquid or the like to form a solution [a mixture of solvent (water) and solute (humidifying liquid or the like)]. As shown in Figures 12 to 15, the solution flows through the liquid outlet hole 19 (liquid outlet hole 21) and flows out from the other end face 7B of the liquid outlet cylinder 7 (one end face 8A of the joint cylinder 8).

[0105] As shown in Figures 5 to 9, the fluid injection adapter Y, by positioning the switching shaft 2 in the first switching position P1, blocks the liquid inlet passage γ1 from each liquid inlet hole 12 (liquid inlet hole 18) and each fluid injection hole 13 (liquid outlet hole 19), and connects the fluid injection passage γ2 to each fluid injection hole 13 (liquid outlet hole 19), allowing humidifying liquid, etc., to flow into the fluid injection passage γ2. The humidifying liquid, etc., that has flowed into the fluid injection passage γ2 can then be injected (stored) into the liquid outlet hole 19 by flowing through the fluid injection passage γ2 [fluid injection horizontal holes 71 (first and second horizontal holes 73, 74), fluid injection vertical hole 72] and each fluid injection hole 13 in that order.

[0106] As shown in Figures 12 to 16, the fluid injection adapter Y, by positioning the switching shaft 2 in the second switching position P2, blocks the fluid injection passage γ2 from each fluid injection hole 13 (liquid outlet hole 19), and connects the liquid inlet passage γ1 to each liquid inlet hole 12 (liquid inlet hole 18) and each fluid injection hole 13 (liquid outlet hole 19), allowing the liquid (water) flowing into the liquid inlet hole 18 to flow in the order of each liquid inlet hole 12, liquid inlet passage γ1 (second liquid inlet vertical hole 63, liquid inlet horizontal hole 61, first liquid inlet vertical hole 62), and each fluid injection hole 13, and then out to the liquid outlet hole 19.

[0107] As shown in Figures 12 to 16, the fluid injection adapter Y injects (stores) a humidifying liquid or the like (fluid) into the liquid outlet hole 19, and then moves the switching shaft 2 from the first switching position P1 to the second switching position P, thereby causing the liquid (water) that has flowed into the liquid inlet hole 18 to flow out to the liquid outlet hole 19, creating a solution (a mixture of water and the humidifying liquid, etc.) by mixing the humidifying liquid, etc. injected into the liquid outlet hole 19 with the liquid (water), and allowing the solution to flow out from the liquid outlet hole 19.

[0108] As shown in Figures 1 to 16, the fluid injection adapter Y moves the switching shaft 2 between a first switching position P1 and a second switching position P2, and when a humidifying liquid or the like is injected into the liquid outlet hole 19 at the first switching position P, a liquid (water) or solution (a mixture of water and a humidifying liquid, etc.) can be discharged from the liquid outlet hole 19.

[0109] As shown in Figures 32 to 35, the shower head Z is connected to the fluid injection adapter Y (liquid outlet cylinder 7). The shower head Z has a cylindrical shower body 81 and a watering nozzle 82 connected to one end face 81A of the shower body 81.

[0110] As shown in Figures 34 and 35, the shower body 81 has liquid flow passages γ3 (liquid flow holes) that penetrate the shower body 81 and open at each cylindrical end face 81A, 81B of the shower body 81. The shower body 81 has a male threaded portion 83. The male threaded portion 83 is located on the other cylindrical end face 81B side of the shower body 81. The male threaded portion 83 is formed on the outer circumferential surface 81a of the shower body 81.

[0111] As shown in Figure 34, the watering nozzle 82 is connected to the liquid flow passage γ3 and discharges (sprays) liquid. The watering nozzle 82 has a watering nozzle hole 84 (nozzle hole) that is connected to the liquid flow passage γ3 and discharges (sprays) liquid.

[0112] The shower body 81 (shower head Z) is connected to the liquid outlet cylinder 7 (joint cylinder 8) as shown in Figures 32 to 35. The shower body 81 is positioned on the adapter body 1 (liquid outlet cylinder 7) with its other end face 81B connected to the liquid outlet cylinder 7 and its liquid flow passage γ3 communicating with the liquid outlet hole 19. The shower body 81 (shower head Z) is connected to the joint cylinder 8 by inserting its other end face 81B into the liquid outlet hole 21 from one end face 8A of the joint cylinder 8, and screwing the male threaded portion 83 into the female threaded portion 22. The shower body 81 (shower head Z) is connected to the liquid outlet cylinder 7 via the joint cylinder 8. In the shower body 81 (shower head Z), the liquid flow passage γ3 communicates with the liquid outlet hole 19 through the liquid outlet hole 21.

[0113] In the shower device X, when the switching shaft 2 is moved from the first switching position P1 to the second switching position P2, the liquid (water) that flows into the liquid inlet hole 18 flows in the following order, as described in Figures 12 to 16: liquid inlet hole 18, each liquid introduction hole 12, liquid inlet passage γ1 (second liquid inlet vertical hole 63, liquid inlet horizontal hole 61, first liquid inlet vertical hole 62), and each fluid discharge hole 13, and is discharged into the liquid outlet hole 19 (see Figures 36 and 37).

[0114] With the switching shaft 2 in the second switching position P2, the liquid (water) that flows out into the liquid outlet hole 19 flows through the liquid outlet hole 19 (in the order of liquid outlet hole 19, then liquid discharge hole 21) and enters the liquid flow passage γ3 (liquid flow hole) of the shower body 81 from the other cylindrical end face 81B of the shower body 81, as shown in Figure 36.

[0115] In the shower body 81, the liquid (water) that flows into the liquid flow passage γ3 flows through the liquid flow passage γ3 (liquid flow hole) and flows into the watering nozzle 82 (watering nozzle hole 84), as shown in Figure 36.

[0116] As shown in Figure 36, the liquid (water) that flows into the watering nozzle 82 is discharged (sprayed) from the watering nozzle 82. The liquid (water) that flows into the watering nozzle hole 84 flows through the watering nozzle hole 84 and is discharged (sprayed) from the watering nozzle hole 84. The watering nozzle 82 discharges (sprays) the liquid (water) that flows into the watering nozzle 82. The watering nozzle 82 discharges (sprays) the liquid (water) that flows into the watering nozzle hole 84 from the watering nozzle hole 84.

[0117] In the shower device X, when the switching shaft 2 is moved from the second switching position P2 to the first switching position P1, moisturizing liquid, etc., flows into the fluid injection passage γ2 from the inlet 73A, as explained in Figures 5 to 9 (see Figures 34 and 35).

[0118] With the switching shaft 2 in the first switching position P1, the humidifying liquid, etc., that flows into (injects) the fluid injection passage γ2 flows in the same manner as described in Figures 5 to 9, through the fluid injection passage γ2 and each fluid injection hole 13, flows into the liquid outlet hole 19, and is injected (stored) in the liquid outlet hole 19 (liquid discharge hole 21).

[0119] In the shower device X, after injecting (storing) a moisturizing liquid or the like into the liquid outlet hole 19, when the switching shaft 2 is moved from the first switching position P1 to the second switching position P2, the liquid (water) that has flowed into the liquid inlet hole 18 flows in the same manner as described in Figures 12 to 16, through the liquid inlet hole 18, each liquid introduction hole 12, the liquid inlet passage γ1, and each fluid injection hole 13, and is discharged into the liquid outlet hole 19.

[0120] When various functional liquids such as humectants are injected into the liquid outlet hole 19 and the switching shaft 2 is positioned at the second switching position P2, the liquid (water) that flows out of the liquid outlet hole 19 is mixed with the humectant, etc. injected (stored) into the liquid outlet hole 19, as shown in Figures 36 and 37, diluting the humectant, etc. to form a solution [a mixture of solvent (water) and solute (humectant, etc.)]. The solution flows through the liquid outlet hole 19 (liquid discharge hole 21) and enters the liquid flow passage γ3 (liquid flow hole) of the shower body 81 from the other end face 7B of the liquid outlet cylinder 7 (one end face 8A of the joint cylinder 8).

[0121] In the shower body 81, the solution that flows into the liquid flow passage γ3 flows through the liquid flow passage γ3 (liquid flow hole) and flows into the watering nozzle 82 (watering nozzle hole 84), as shown in Figure 36.

[0122] The solution that flows into the watering nozzle 82 is discharged (sprayed) from the watering nozzle 82, as shown in Figure 36. The solution that flows into the watering nozzle hole 84 flows through the watering nozzle hole 84 and is discharged (sprayed) from the watering nozzle hole 84. The watering nozzle 82 discharges (sprays) the solution that flows into the watering nozzle 82. The watering nozzle 82 discharges (sprays) the solution that flows into the watering nozzle hole 84 from the watering nozzle hole 84.

[0123] As shown in Figures 34 and 35, the shower device X, by positioning the switching shaft 2 in the first switching position P1, blocks the liquid inlet passage γ1 from each liquid inlet hole 12 (liquid inlet hole 18) and each fluid injection hole 13 (liquid outlet hole 19), and connects the fluid injection passage γ2 to each fluid injection hole 13 (liquid outlet hole 19), allowing moisturizing liquid, etc., to flow into the fluid injection passage γ2. The moisturizing liquid, etc., that has flowed into the fluid injection passage γ is then directed through the fluid injection passage γ2 [fluid injection horizontal holes 71 (first and second horizontal holes 73, 74), fluid injection vertical hole 72] and each fluid injection hole 13 in that order, and can be injected (stored) into the liquid outlet hole 19 and the liquid flow passage γ3 of the shower body 81.

[0124] As shown in Figures 36 and 37, the shower device X, by positioning the switching shaft 2 in the second switching position P2, blocks the fluid injection passage γ2 from each fluid injection hole 13 (liquid outlet hole 19), and connects the liquid inlet passage γ1 to each liquid inlet hole 12 (liquid inlet hole 18) and each fluid injection hole 13 (liquid outlet hole 19). The liquid (water) flowing into the liquid inlet hole 18 flows in the order of each liquid inlet hole 12, liquid inlet passage γ1 (second liquid inlet vertical hole 63, liquid inlet horizontal hole 61, first liquid inlet vertical hole 62), and each fluid injection hole 13, allowing it to flow out from the liquid outlet hole 19 into the liquid flow passage γ3 of the shower body 81, and the liquid (water) can be discharged (sprayed) from the watering nozzle hole 84 of the watering nozzle 82.

[0125] As shown in Figure 36, the shower device X injects (stores) a moisturizing liquid or the like (fluid) into the liquid outlet hole 19, and then moves the switching shaft 2 from the first switching position P1 to the second switching position P2, thereby causing the liquid (water) that has flowed into the liquid inlet hole 18 to flow out to the liquid outlet hole 19, creating a mixed solution (a mixture of water and the moisturizing liquid) of the moisturizing liquid or the like injected into the liquid outlet hole 19 and the liquid (water). This solution can then flow out of the liquid outlet hole 19 into the liquid flow passage γ3 of the shower body 81, and the solution can be discharged (sprayed) from the watering nozzle hole 84 of the watering nozzle 82.

[0126] The shower device X moves the switching shaft 2 between a first switching position P1 and a second switching position P2, and at the first switching position P1, injects a moisturizing liquid or the like into the liquid outlet hole 19, thereby discharging (spraying) a liquid (water) or solution (a mixture of water and moisturizing liquid, etc.) from the watering nozzle hole 84 of the watering nozzle 82.

[0127] In Figures 38 to 43, the fluid injection adapter Y (fluid injection adapter Y of the shower device X) receives liquid such as moisturizing liquid sprayed from the valve stem 95 of the pressure vessel W (pressure can) into the fluid injection passage γ2.

[0128] As shown in Figures 42 and 43, the pressure vessel W (pressure can) has a container body 91, a mountain cup 92 (container lid), a housing 93 (cylindrical part), a valve seat 94, a valve stem 95 (stem shaft / stem tube), a coil spring 96 (biasing member), and a dip tube 97 (tube).

[0129] As shown in Figures 38 to 43, the container body 91 has a container section 101 and a container bottom section 102. The container section 101 is formed in a cylindrical shape. The container bottom section 102 closes one end surface 101A of the container body 91 and is fixed to the container body 91. The container body 91 has a storage space τ (space) inside.

[0130] As shown in Figures 42 and 43, the mounting cup 92 has a stem insertion hole 103. The mounting cup 92 is positioned on the container body 101 (container body 91) with the stem insertion hole 103 concentric with the container body 101 (container body 91). The mounting cup 92 is fixed to the container body 101 (container body 91) by closing the other cylindrical end face 101B of the container body 101.

[0131] As shown in Figures 42 and 43, the housing 93 is formed in a cylindrical shape. The housing 93 is formed with a diameter reduction, having an inner circumferential step portion 93C at a position along the length of the cylinder from one end face 93A of the housing 93. The housing 93 is positioned concentrically with the container body 101 (container main body 91) and the stem insertion hole 103, and is placed inside the container body 101 (storage space τ). The housing 93 is fixed to the mount cup 92 with one end face 93A (inner circumferential step portion 93C) facing the mount cup 92 and the other end face 93B facing the container bottom 102.

[0132] As shown in Figures 42 and 43, the valve seat 94 has a valve seat plate 105 and a valve seat cylinder portion 106. The valve seat plate 105 is formed in an annular shape and has a plate surface 105A and a plate surface 105B in the direction of the plate thickness. The valve seat cylinder portion 106 is arranged concentrically with the valve seat plate 105. The valve seat cylinder portion 106 is positioned so that one end surface of the valve seat cylinder portion 106 abuts against the plate surface 105B of the valve seat plate 105. The valve seat cylinder portion 106 protrudes from the plate surface 105B of the valve seat plate 105 and is fixed to the valve seat plate 105.

[0133] As shown in Figures 42 and 43, the valve seat 94 is positioned inside the container body 101 (inside the container main body 91) concentrically with the stem insertion hole 103 and the housing 93. The valve seat 94 is positioned in the housing 93 with the plate surface 105A of the valve seat plate 105 in contact with the mounting cup 92 and the plate surface 105B of the valve seat plate 105 in contact with one cylindrical end surface 93A of the housing 93. The valve seat 94 is positioned so that the valve seat cylinder portion 106 protrudes into the housing 93 from one cylindrical end surface 93A of the housing 93.

[0134] As shown in Figures 42 and 43, the valve stem 95 (stem) is formed in a circular axial shape (circular axis) and has a flange 107, a liquid injection hole 108, and a stem lateral hole 109. The liquid injection hole 108 is formed in the valve stem 95, opening at one axial end face 95A of the valve stem 95. The liquid injection hole 108 extends from one axial end face 95A to the other axial end face 95B of the valve stem 95. The stem lateral hole 109 is formed between the outer circumferential surface of the valve stem 95 and the liquid injection hole 108 in a direction perpendicular to the axial centerline of the valve stem 95. The stem lateral hole 109 opens at the outer circumferential surface of the valve stem 95 and communicates with the liquid injection hole 108. The flange 107 is positioned between the other axial end face 95B of the valve stem 95 and the stem lateral hole 109. The flange portion 107 is positioned on the other axial end face 95B side of the valve stem 95. The flange portion 107 protrudes from the outer circumferential surface of the valve stem 95 in a direction perpendicular to the axial centerline of the valve stem 95 (radial direction of the valve stem 95) and is fixed to the valve stem 95.

[0135] As shown in Figures 42 and 43, the valve stem 95 is positioned by inserting the flange portion 107 into the housing 93 between one cylindrical end face 93A and the inner circumferential step portion 93C of the housing 93. The valve stem 95 is positioned so that one shaft end face 95A of the valve stem 95 passes through the valve seat cylinder portion 106 and the stem insertion hole 103 in that order, with the one shaft end face 95A protruding outward from the mount cup 92.

[0136] As shown in Figures 42 and 43(a), the coil spring 96 is positioned between the flange 107 of the valve stem 95 and the inner circumferential step 93C (inner step) of the housing 93. The coil spring 96 biases the flange 107 toward the valve seat cylinder 106, causing the flange 107 to contact the other end surface 106B of the valve seat cylinder 106, inserting the stem lateral hole 109 of the valve stem 95 into the valve seat cylinder 106, and closing the stem lateral hole 109 with the inner circumferential surface 106a of the valve seat cylinder 106.

[0137] As shown in Figures 42 and 43, the dip tube 97 is positioned inside the container body 91. The dip tube 97 is connected to the inside of the housing 93 by fitting one end face 97A of the dip tube 97 onto the other end face 93B of the housing 93. The other end face 97B of the dip tube 97 is positioned towards the bottom 102 of the container and is positioned inside the container body 91 (storage space τ).

[0138] As shown in Figure 42, the pressure vessel W stores (seals) a liquid Wa (undiluted solution) such as a humidifying solution and a propellant Ab (compressed gas, liquefied gas) inside. The pressure vessel W stores (seals) a liquid Wa (undiluted solution) such as a humidifying solution and a propellant Ab (compressed gas, liquefied gas) inside the container body 91 (storage space τ). The liquid Wa such as a humidifying solution is stored at the bottom 102 side of the container body 91 (storage space τ). The other end face 97B of the dip tube 97 is immersed in the liquid Wa such as a humidifying solution stored inside the container body 91 (storage space τ). The propellant Ab is stored inside the container body 91 (storage space τ) on the mount cup 92 side (between the mount cup 92 and the liquid surface of the liquid Wa such as a humidifying solution).

[0139] As shown in Figure 43(b), the pressure vessel W pushes the valve stem 95 into the vessel body 91 (inside the housing 93) against the biasing force (spring force) of the coil spring 96, thereby opening the stem side hole 109 into the housing 93 and connecting the liquid injection hole 108 to the dip tube 97. The liquid injection hole 108 is connected to the dip tube 97 through the stem side hole 109 and inside the housing 93 when the valve stem 95 is pushed into the vessel body 91 (inside the housing 93) against the biasing force (spring force) of the coil spring 96.

[0140] As shown in Figure 43(b), when the liquid injection hole 108 of the pressure vessel W is connected to the dip tube 97, the liquid such as humidifying liquid stored inside the container body 91 (inside the pressure vessel W) flows in the order of dip tube 97, inside the housing 93, the stem side hole 109 and the liquid injection hole 108, and the liquid such as humidifying liquid is injected from the liquid injection hole 108.

[0141] As shown in Figure 43(b), when the valve stem 95 is pushed into the container body 91 (housing 93) against the biasing force of the coil spring 96 (spring), and the liquid injection hole 108 (stem side hole 109) is connected to the dip tube 97, the liquid Wa, such as the moisturizing liquid stored inside the pressure vessel W (container body 91), flows in the order of dip tube 97, inside the housing 93, stem side hole 109, and liquid injection hole 108 due to the pressure of the propellant Ab inside the pressure vessel W (container body 91), and is injected from the liquid injection hole 108.

[0142] As shown in Figures 40 and 41, when the switching shaft 2 is in the first switching position P1, the valve stem 95 of the pressure vessel W (a pressure vessel W storing a liquid Wa such as moisturizing liquid and a propellant Ab) is inserted into the fluid injection passage γ2 [fluid injection horizontal hole 71 (first horizontal hole section 73)] of the fluid injection adapter Y (fluid injection adapter Y of the shower device X), and the liquid such as moisturizing liquid is injected by the pressure of the propellant Ab.

[0143] As shown in Figures 40 and 41, the fluid injection passage γ2 is connected to the valve stem 95 of the pressure vessel W when the switching shaft 2 is in the first switching position P1. When the switching shaft 2 is in the first switching position P1, the pressure vessel W inserts the valve stem 95 into the fluid injection passage γ2 (fluid injection horizontal hole 71, first horizontal hole section 73) from the other shaft end face 2B of the switching shaft 2 [the injection port 73A of the fluid injection passage γ2 (fluid injection horizontal hole 71, first horizontal hole section 73) which opens at the other shaft end face 2B], and one shaft end face 95A of the valve stem 95 abuts against the stepped portion M of the fluid injection passage γ2 (fluid injection horizontal hole 71, second horizontal hole 73), thereby connecting to the fluid injection passage γ2 (fluid injection horizontal hole 71, first horizontal hole section 73).

[0144] As shown in Figure 41, the pressure vessel W is moved relative to the valve stem 95 toward the other shaft end face 2B of the switching shaft 2 (by moving the container body 91 toward the other shaft end face 2B of the switching shaft 2 relative to the valve stem 95), and the valve stem 95 is pushed into the pressure vessel W (inside the container body 91, inside the housing 93), causing the liquid Wa, such as moisturizer, to be injected from the valve stem 95 (liquid injection hole 108) into the fluid injection passage γ2 (fluid injection side hole 71, second side hole 74) by the pressure of the propellant Ab stored in the pressure vessel W (inside the container body 91).

[0145] In the fluid injection adapter Y (fluid injection adapter Y of the shower device X), the fluid injection passage γ2 is connected to the pressure vessel W. As shown in Figures 38 to 41, the fluid injection passage γ2 is connected to the pressure vessel W when the switching shaft 2 is in the first switching position P1. As shown in Figures 42 and 43, the pressure vessel W includes a container body 91 (bottomed container body) that stores a liquid Wa (liquid such as a moisturizing liquid) and propellant Ab, which are different from the liquid (water) that flows into the liquid inlet hole 18, a mount cap 92 (lid) that closes the opening of the container body 91 (the other cylindrical end face 101B of the container body 101) and is fixed to the container body 91, and a stem 95 (nozzle tube) that is formed in an axial shape and has a liquid injection hole 108 that opens to one of the axial end faces 95A. The stem 95 is movably positioned relative to the mount cap 92. The stem 95 is positioned with one shaft end face 95A protruding from the mounting cap 92 to the outside of the container body 91 (mounting cap 92), and the other shaft end face 95B inserted into the container body 91 (housing 93). As shown in Figure 41, one shaft end face 95A of the stem 95 is inserted into the fluid injection passage γ2 [fluid injection horizontal hole 71 (first horizontal hole section 73)] from the other shaft end face 2B (injection hole 73A) of the switching shaft 2, and one shaft end face 95A of the stem abuts against the stepped portion M of the fluid injection passage γ2 [fluid injection horizontal hole 71 (first horizontal hole section 73)], thereby connecting the liquid injection hole 108 to the fluid injection passage γ2 [fluid injection horizontal hole 71 (first horizontal hole section 73)]. With one end face 95A of the stem 95 in contact with the stepped portion M, the container body 91 is moved toward the other end face 2B of the switching shaft 2 (the plate surface 52A of the closing portion 52), pushing the stem 95 into the container body 91 (inside the housing 93). As the stem 95 is pushed into the container body 91 (inside the housing 93), the pressure of the propellant Ab (compressed gas) causes the liquid Wa stored in the container body 91 to flow into the liquid injection hole 108. The liquid injection hole 108 injects the liquid Wa that has flowed in from the container body 91 into the fluid injection passage γ2 [fluid injection horizontal hole 71 (first horizontal hole portion 73)].

[0146] Liquid Wa, such as moisturizing liquid, injected into the fluid injection channel γ2 (fluid injection horizontal hole 71, second horizontal hole 73) flows through the fluid injection channel γ2 [fluid injection horizontal hole 71 (first and second horizontal holes 73, 74, fluid injection vertical hole 72)] and into each fluid injection hole 13, as explained in Figures 5 to 9, 32 and 35. Liquid Wa, such as moisturizing liquid, that flows into each fluid injection hole 13 flows through each fluid injection hole 13 and is injected (stored) into the liquid outlet hole 19 (liquid flow passage γ3 of the shower body 81). [Industrial applicability]

[0147] This invention is ideal for injecting moisturizing liquids or the like into the shower head body. [Explanation of Symbols]

[0148] X Shower device Y Fluid injection adapter (liquid injection adapter) Z Shower Head 1. Adapter body 2 Switching shaft 2A One end face of the shaft 2B The other shaft end face 5 Guide cylinder 6 Liquid inlet cylinder 7 Liquid outlet cylinder 12 Liquid inlet hole 13 Fluid injection hole 18 Liquid inlet hole 19. Liquid outlet hole γ1 Liquid inflow path γ2 fluid injection path P1 1st switching position P2 2nd switching position 81 Shower unit 82 Sprinkler nozzles 84 watering nozzle holes γ3 Liquid flow path

Claims

1. It comprises a fluid injection adapter, a cylindrical shower body, and a shower head having a watering nozzle connected to one end face of the shower body, The aforementioned fluid injection adapter is The adapter body comprises a guide cylinder, a liquid inlet cylinder into which liquid flows, and a liquid outlet cylinder, and a switching shaft having a liquid inlet passage and a fluid injection passage. The aforementioned guide cylinder is The shaft holes penetrate the guide cylinder and are opened at each end face of the guide cylinder, A liquid introduction hole is provided, which is arranged at intervals on one end surface of the guide cylinder, penetrates the guide cylinder, and opens into the outer surface of the guide cylinder and the shaft hole, The guide cylinder has a fluid injection hole that is positioned between the liquid injection hole and the other end face of the guide cylinder, spaced apart in the direction of the centerline of the cylinder, and which penetrates the guide cylinder and opens to the outer surface of the guide cylinder and the shaft hole, The aforementioned liquid inlet cylinder is The liquid inlet cylinder penetrates the liquid inlet cylinder and has liquid inlet holes that open on each end face of the liquid inlet cylinder into which liquid flows, The liquid inlet cylinder is fixed to the guide cylinder by having one end surface of the liquid inlet cylinder abut against the outer surface of the guide cylinder, and the liquid inlet hole is connected to the liquid introduction hole, and the liquid inlet cylinder is positioned on the guide cylinder. The aforementioned liquid outlet cylinder is The liquid outlet cylinder penetrates the liquid outlet cylinder and has liquid outlet holes that open on each end face of the liquid outlet cylinder, The liquid outlet cylinder is fixed to the guide cylinder by having one end surface of the cylinder contact the outer surface of the guide cylinder, and the liquid outlet hole is connected to the fluid injection hole, and the cylinder is positioned on the guide cylinder. The aforementioned liquid inflow passage is In the direction of the axis centerline of the switching shaft, the following are arranged at intervals on one end face of the switching shaft: It penetrates the switching shaft and is opened on the outer circumferential surface of the switching shaft, The aforementioned fluid injection channel is In the direction of the axis centerline of the switching shaft body, the liquid inlet passage is spaced apart from the other end face of the switching shaft body, The opening penetrates the aforementioned switching shaft and is located on the outer circumferential surface of the switching shaft and on the other end face of the switching shaft. The aforementioned switching shaft body is One end face of the switching shaft protrudes from one end face of the guide cylinder, and the other end face of the switching shaft protrudes from the other end face of the guide cylinder, and is inserted into the shaft hole. The shaft is positioned in the shaft hole so as to be movable in the direction of the center line of the guide cylinder relative to the guide cylinder, The guide cylinder is moved between the first switching position and the second switching position in the direction of the cylinder's centerline. In the first switching position, the liquid inlet passage is blocked from the liquid introduction hole and the fluid injection hole, and the fluid injection passage is connected to the fluid injection hole through an opening on the outer surface of the switching shaft body. In the second switching position, the fluid injection passage is blocked from the fluid injection hole, and the liquid inflow passage is connected to the liquid introduction hole and the fluid injection hole. The aforementioned shower body is The shower body has a liquid flow passage that penetrates the shower body and opens to each cylindrical end face of the shower body, The other end of the shower body is connected to the liquid outlet cylinder, and the liquid flow passage is connected to the liquid outlet hole, and the adapter body is positioned accordingly. The aforementioned watering nozzle is It has a water spray nozzle hole that communicates with the aforementioned liquid flow passage and discharges liquid. A shower device characterized by the following features.

2. The adapter body comprises a guide cylinder, a liquid inlet cylinder into which liquid flows, and a liquid outlet cylinder, and a switching shaft having a liquid inlet passage and a fluid injection passage. The aforementioned guide cylinder is The shaft holes penetrate the guide cylinder and are opened at each end face of the guide cylinder, A liquid introduction hole is provided, which is arranged at intervals on one end surface of the guide cylinder, penetrates the guide cylinder, and opens into the outer surface of the guide cylinder and the shaft hole, The guide cylinder has a fluid injection hole that is positioned between the liquid injection hole and the other end face of the guide cylinder, spaced apart in the direction of the centerline of the cylinder, and which penetrates the guide cylinder and opens to the outer surface of the guide cylinder and the shaft hole, The aforementioned liquid inlet cylinder is The liquid inlet cylinder penetrates the liquid inlet cylinder and has liquid inlet holes that open on each end face of the liquid inlet cylinder into which liquid flows, The liquid inlet cylinder is fixed to the guide cylinder by having one end surface of the liquid inlet cylinder abut against the outer surface of the guide cylinder, and the liquid inlet hole is connected to the liquid introduction hole, and the liquid inlet cylinder is positioned on the guide cylinder. The aforementioned liquid outlet cylinder is The liquid outlet cylinder penetrates the liquid outlet cylinder and has liquid outlet holes that open on each end face of the liquid outlet cylinder, The liquid outlet cylinder is fixed to the guide cylinder by having one end surface of the cylinder contact the outer surface of the guide cylinder, and the liquid outlet hole is connected to the fluid injection hole, and the cylinder is positioned on the guide cylinder. The aforementioned liquid inflow passage is In the direction of the axis centerline of the switching shaft, the following are arranged at intervals on one end face of the switching shaft: It penetrates the switching shaft and is opened on the outer circumferential surface of the switching shaft, The aforementioned fluid injection channel is In the direction of the axis centerline of the switching shaft body, the liquid inlet passage is spaced apart from the other end face of the switching shaft body, The opening penetrates the aforementioned switching shaft and is located on the outer circumferential surface of the switching shaft and on the other end face of the switching shaft. The aforementioned switching shaft body is One end face of the switching shaft protrudes from one end face of the guide cylinder, and the other end face of the switching shaft protrudes from the other end face of the guide cylinder, and is inserted into the shaft hole. The shaft is positioned in the shaft hole so as to be movable in the direction of the center line of the guide cylinder relative to the guide cylinder, The guide cylinder is moved between the first switching position and the second switching position in the direction of the cylinder's centerline. In the first switching position, the liquid inlet passage is blocked from the liquid introduction hole and the fluid injection hole, and the fluid injection passage is connected to the fluid injection hole through an opening on the outer surface of the switching shaft body. In the second switching position, the fluid injection passage is blocked from the fluid injection hole, and the liquid inflow passage is connected to the liquid introduction hole and the fluid injection hole. A fluid injection adapter characterized by the following features.

3. The aforementioned fluid injection channel is With the switching shaft positioned at the first switching position, it is connected to the pressure vessel, The aforementioned pressure vessel is A container body for storing a liquid different from the liquid flowing into the liquid inlet hole, and a propellant, A mounting cap is fixed to the container body, closing the opening of the container body, It comprises a stem formed in an axial shape and having a liquid injection hole opening on one end face of the shaft, The aforementioned stem is, The mount cap is movably positioned, One end of the shaft protrudes from the mounting cap, and the other end of the shaft is inserted into the container body. One end face of the shaft is inserted into the fluid injection passage from the other end face of the switching shaft, and the other end face of the shaft is brought into contact with the stepped portion of the fluid injection passage, thereby connecting the liquid injection hole to the fluid injection passage. The container body is With one end face of the stem in contact with the stepped portion, the other end face of the switching shaft is moved toward the other end face of the switching shaft, pushing the stem into the container body. As the stem is pushed into the container body, the pressure of the propellant causes the liquid stored in the container body to flow into the liquid injection hole. The aforementioned liquid injection holes are The liquid flowing in from the container body is injected into the fluid injection channel. The shower device according to feature 1.

4. The aforementioned fluid injection channel is With the switching shaft positioned at the first switching position, it is connected to the pressure vessel, The aforementioned pressure vessel is A container body for storing a liquid different from the liquid flowing into the liquid inlet hole, and a propellant, A mounting cap is fixed to the container body, closing the opening of the container body, It comprises a stem formed in an axial shape and having a liquid injection hole opening on one end face of the shaft, The aforementioned stem is, The mount cap is movably positioned, One end of the shaft protrudes from the mounting cap, and the other end of the shaft is inserted into the container body. One end face of the shaft is inserted into the fluid injection passage from the other end face of the switching shaft, and the other end face of the shaft is brought into contact with the stepped portion of the fluid injection passage, thereby connecting the liquid injection hole to the fluid injection passage. The container body is With one end face of the stem in contact with the stepped portion, the other end face of the switching shaft is moved toward the other end face of the switching shaft, pushing the stem into the container body. As the stem is pushed into the container body, the pressure of the propellant causes the liquid stored in the container body to flow into the liquid injection hole. The aforementioned liquid injection holes are The liquid flowing in from the container body is injected into the fluid injection channel. The fluid injection adapter according to feature 2.

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